I have a working VPN setup (between a router and a PIX) based on crypto
maps. For education's sake, I tried to replace the crypto map ny a tunnel
interface on the router. Basically, it looks like this:

The ISAKMP part is left unchanged, the relevant parameters look comparable.
I'm aware that a route to the remote network is missing to make things work
but the problem is that the tunnel doesn't come up (see "show ip int
brief") so that the route is ignored.

What I'm wondering now is whether crypto maps and tunnel interfaces are
just different notations for the same thing (which would make them
interchangeable) or if they are completely different from each other. IOW:
can I use tunnel interfaces with a PIX or just with another tunnel
interface at the remote end?